U.S. patent application number 17/423555 was filed with the patent office on 2022-03-10 for a scroll compressor including a baseplate having a mounting base and a cylindrical rim secured by a double-welded t-joint.
The applicant listed for this patent is Danfoss Commercial Compressors. Invention is credited to Remi Bou Dargham, Arnaud Daussin, David Genevois, Dominique Gross, Cyril Montes.
Application Number | 20220074412 17/423555 |
Document ID | / |
Family ID | |
Filed Date | 2022-03-10 |
United States Patent
Application |
20220074412 |
Kind Code |
A1 |
Genevois; David ; et
al. |
March 10, 2022 |
A SCROLL COMPRESSOR INCLUDING A BASEPLATE HAVING A MOUNTING BASE
AND A CYLINDRICAL RIM SECURED BY A DOUBLE-WELDED T-JOINT
Abstract
The scroll compressor (2) including a hermetic enclosure (3), a
compression unit (11) configured to compress refrigerant, and an
electric motor (16) configured to drive the compression unit (11)
via a drive shaft (15), the hermetic enclosure (3) including a
midshell (4), an upper cap (5) and a baseplate (6), the baseplate
(6) including a mounting base (24) having a plate shape and
including a central portion, and a cylindrical rim surrounding the
central portion and extending upwardly, the cylindrical rim (28)
being secured to the mounting base (24) by a double-welded T-joint
(29), the double-welded T-joint (29) including an inner welding
seam connecting an inner surface of the cylindrical rim (28) to the
mounting base (24), and an outer welding seam connecting an outer
surface of the cylindrical rim (28) to the mounting base (24).
Inventors: |
Genevois; David; (Nordborg,
DK) ; Bou Dargham; Remi; (Nordborg, DK) ;
Montes; Cyril; (Nordborg, DK) ; Daussin; Arnaud;
(Nordborg, DK) ; Gross; Dominique; (Nordborg,
DK) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Danfoss Commercial Compressors |
Trevoux |
|
FR |
|
|
Appl. No.: |
17/423555 |
Filed: |
January 27, 2020 |
PCT Filed: |
January 27, 2020 |
PCT NO: |
PCT/EP2020/051869 |
371 Date: |
July 16, 2021 |
International
Class: |
F04C 23/00 20060101
F04C023/00; F04C 18/02 20060101 F04C018/02; F04C 23/02 20060101
F04C023/02 |
Foreign Application Data
Date |
Code |
Application Number |
Feb 13, 2019 |
FR |
19/01452 |
Claims
1. A scroll compressor comprising a hermetic enclosure, a
compression unit configured to compress refrigerant, and an
electric motor configured to drive the compression unit via a drive
shaft, the hermetic enclosure comprising a midshell, an upper cap
and a baseplate, the baseplate comprising a mounting base having a
plate shape and including a central portion, wherein the baseplate
further comprises a cylindrical rim surrounding the central portion
and extending upwardly, the cylindrical rim being secured to the
mounting base by a double-welded T-joint, the double-welded T-joint
including an inner welding seam connecting an inner surface of the
cylindrical rim to the mounting base, and an outer welding seam
connecting an outer surface of the cylindrical rim to the mounting
base.
2. The scroll compressor according to claim 1, wherein the
cylindrical rim extends substantially perpendicularly to an upper
surface of the mounting base.
3. The scroll compressor according to claim 1, wherein each of the
inner welding seam and the outer welding seam is annular.
4. The scroll compressor according to claim 1, wherein the
cylindrical rim is secured to the midshell by welding.
5. The scroll compressor according to claim 4, wherein a lower end
portion of the midshell overlaps and surrounds the outer surface of
the cylindrical rim.
6. The scroll compressor according to claim 4, wherein a lower end
portion of the midshell overlaps the inner surface of the
cylindrical rim and is surrounded by the cylindrical rim.
7. The scroll compressor according to claim 4, wherein the midshell
has an outer diameter which corresponds substantially to an outer
diameter of the cylindrical rim, the midshell being secured to the
cylindrical rim by a welded butt joint.
8. The scroll compressor according to claim 7, wherein the welded
butt joint comprises an inner cylindrical support ring arranged
within the hermetic casing and overlapping a butt joint area.
9. The scroll compressor according to claim 1, wherein the central
portion of the mounting base has a concave shape to accommodate an
oil sump formed at the bottom of the hermetic compressor volume
and/or an oil pump attached to the lower end of the drive
shaft.
10. The scroll compressor according to claim 1, wherein the
mounting base has a generally rectangular shape and includes four
lateral outer edges and four downwardly bent flanges each extending
from and along a respective one of the four lateral outer
edges.
11. The scroll compressor according to claim 1, wherein the
baseplate is configured to be mounted on two mounting rails
extending substantially parallel to each other.
12. The scroll compressor according to claim 11, wherein the
mounting base further comprises fastening holes to accommodate
fastening elements to secure the mounting base on the mounting
rails.
13. The scroll compressor according to claim 1, further comprising
at least one bracket secured to an inner surface of the midshell
and configured to support a lower bearing member rotatably
supporting the drive shaft.
14. The scroll compressor according to claim 13, wherein an upper
axial end face of the cylindrical rim abuts against the at least
one bracket.
15. The scroll compressor according to claim 2, wherein each of the
inner welding seam and the outer welding seam is annular.
16. The scroll compressor according to claim 2, wherein the
cylindrical rim is secured to the midshell by welding.
17. The scroll compressor according to claim 3, wherein the
cylindrical rim is secured to the midshell by welding.
18. The scroll compressor according to claim 2, wherein the central
portion of the mounting base has a concave shape to accommodate an
oil sump formed at the bottom of the hermetic compressor volume
and/or an oil pump attached to the lower end of the drive
shaft.
19. The scroll compressor according to claim 3, wherein the central
portion of the mounting base has a concave shape to accommodate an
oil sump formed at the bottom of the hermetic compressor volume
and/or an oil pump attached to the lower end of the drive
shaft.
20. The scroll compressor according to claim 4, wherein the central
portion of the mounting base has a concave shape to accommodate an
oil sump formed at the bottom of the hermetic compressor volume
and/or an oil pump attached to the lower end of the drive shaft.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application is a National Stage application of
International Patent Application No. PCT/EP2020/051869, filed on
Jan. 27 2020, which claims priority to French Application No.
19/01452 filed on Feb. 13, 2019, each of which is hereby
incorporated by reference in its entirety.
TECHNICAL FIELD
[0002] The present invention relates to a scroll compressor, and in
particular to a scroll refrigeration compressor.
BACKGROUND OF THE INVENTION
[0003] U.S. Pat. No. 8,142,175 discloses a scroll compressor
comprising: [0004] a hermetic enclosure comprising a midshell, an
upper cap and a baseplate, the baseplate comprising a mounting base
having a plate shape and including a central opening, and a central
cap arranged within the central opening, the central cap comprising
a concave portion and a cylindrical rim portion extending upwardly
and having an outer diameter substantially corresponding to an
inner diameter of the midshell, [0005] a compression unit
configured to compress refrigerant, and [0006] an electric motor
configured to drive the compression unit via a drive shaft.
[0007] The mounting base of the above-mentioned scroll compressor
is secured to the central cap at a position radially inside the
inner diameter of the midshell, and via an annular welding
seam.
[0008] Such a configuration of the baseplate leads to vibration and
noise problems, especially in manifolded systems, where at least
two scroll compressors are mounted together on a common rail
system. Particularly, in a manifolded system, the scroll
compressors may be subjected to a rocking movement due to the small
contact surface between the central cap and the mounting base.
[0009] In addition, the baseplate of the above-mentioned scroll
compressor is relatively expensive to manufacture due to the
mounting base and the central cap, which have to be manufactured by
deep-drawing and stamping, and which have to be oriented and welded
together with small tolerances to ensure proper sealing with the
midshell. Further, the deep-drawing of the central cap portion of
the baseplate leads to thickness variations, which have to be
thoroughly controlled to satisfy the high pressure equipment
standards.
SUMMARY
[0010] It is an object of the present invention to provide an
improved scroll compressor which can overcome the drawbacks
encountered in conventional scroll compressors.
[0011] Another object of the present invention is to provide a
scroll compressor which substantially reduces vibration and noise
problems, and which is cheaper to manufacture.
[0012] According to the invention such a scroll compressor
comprises a hermetic enclosure, a compression unit configured to
compress refrigerant, and an electric motor configured to drive the
compression unit via a drive shaft, the hermetic enclosure
comprising a midshell, an upper cap and a baseplate, the baseplate
comprising a mounting base having a plate shape and including a
central portion, characterized in that the baseplate further
comprises a cylindrical rim surrounding the central portion and
extending upwardly, the cylindrical rim being secured to the
mounting base by a double-welded T-joint, the double-welded T-joint
including an inner welding seam connecting an inner surface of the
cylindrical rim to the mounting base, and an outer welding seam
connecting an outer surface of the cylindrical rim to the mounting
base.
[0013] Due to the simple parts forming the baseplate according to
the present invention, i.e. the plate-shaped mounting base and the
cylindrical rim, the manufacturing costs of the baseplate can be
kept low, even that two welding seams are required to connect the
mounting base and the cylindrical rim.
[0014] Further, the baseplate according to the present invention
can be manufactured with less mechanical deformation and mechanical
working than prior art baseplates which particularly include cup
shaped central caps manufactured by deep-drawing and stamping. This
leads to less thickness variations of the baseplate and thus higher
compressor reliability.
[0015] In addition, the baseplate according to the present
invention allows a more stable mounting of the scroll compressor
due to the double-welded T-joint connecting the mounting base and
the cylindrical rim and particularly due to the important contact
area between the mounting base and the cylindrical rim formed by
the inner welding seam and the outer welding seam. Therefore, the
baseplate according to the present invention satisfies the
requirements of the high pressure equipment standards, and it
reduces the risk of rocking movements of the scroll compressor. At
the same time, the natural frequency of the entire scroll
compressor equipped with the baseplate is shifted to a higher
level, which reduces noise and vibration issues.
[0016] The scroll compressor may also include one or more of the
following features, taken alone or in combination.
[0017] According to an embodiment of the invention, the cylindrical
rim and the midshell are concentrically arranged.
[0018] According to an embodiment of the invention, the cylindrical
rim extends substantially perpendicularly to an upper surface of
the mounting base.
[0019] According to an embodiment of the invention, each of the
inner welding seam and the outer welding seam is annular.
[0020] According to an embodiment of the invention, the inner and
outer welding seams are concentrically arranged.
[0021] According to an embodiment of the invention, the cylindrical
rim is secured to the midshell by welding.
[0022] According to an embodiment of the invention, the cylindrical
rim is secured to the midshell by lap welding.
[0023] According to an embodiment of the invention, a lower end
portion of the midshell overlaps and surrounds the outer surface of
the cylindrical rim.
[0024] According to an embodiment of the invention, a lower end
portion of the midshell overlaps the inner surface of the
cylindrical rim and is surrounded by the cylindrical rim.
[0025] According to an embodiment of the invention, the scroll
compressor includes an annular lap joint welding seam securing the
midshell to the cylindrical rim.
[0026] According to an embodiment of the invention, the annular lap
joint welding seam connects a lower edge of the midshell to the
cylindrical rim, and for example to the outer surface of the
cylindrical rim.
[0027] According to an embodiment of the invention, the annular lap
joint welding seam connects an upper edge of the cylindrical rim to
the midshell, and for example to the outer surface of the
midshell.
[0028] According to an embodiment of the invention, the midshell,
and particularly the lower end portion of the midshell, has an
outer diameter which corresponds substantially to an outer diameter
of the cylindrical rim, the midshell being secured to the
cylindrical rim by a welded butt joint, i.e. by butt welding.
[0029] According to an embodiment of the invention, the welded butt
joint includes an annular butt joint welding seam connecting a
lower edge of the midshell to an upper edge of the cylindrical
rim.
[0030] According to an embodiment of the invention, the welded butt
joint comprises an inner cylindrical support ring arranged within
the hermetic casing and overlapping a butt joint area.
[0031] According to an embodiment of the invention, the central
portion of the mounting base has a concave shape to accommodate an
oil sump formed at the bottom of the hermetic compressor volume
and/or an oil pump attached to the lower end of the drive
shaft.
[0032] According to an embodiment of the invention, the baseplate
is configured to be mounted on two mounting rails extending
substantially parallely to each other.
[0033] According to an embodiment of the invention, the mounting
base, and for example the central portion of the mounting base, is
provided with two indentations configured to cooperate with and to
at least partially receive the two mounting rails. Due to such a
configuration of the mounting base, the total height of the scroll
compressor can be reduced.
[0034] According to an embodiment of the invention, the distance
between the two indentations substantially corresponds to the
distance between the mounting rails.
[0035] According to an embodiment of the invention, each
indentation has a shape which is at least partially complementary
to the outer shape of the respective mounting rail.
[0036] According to an embodiment of the invention, the mounting
base further comprises fastening holes to accommodate fastening
elements, e.g. bolts or screws, to secure the mounting base on the
mounting rails.
[0037] According to an embodiment of the invention, the scroll
compressor further comprises at least one bracket secured to an
inner surface of the midshell, e.g. by welding, and configured to
support a lower bearing member rotatably supporting the drive
shaft.
[0038] According to an embodiment of the invention, an upper axial
end face of the cylindrical rim abuts against the at least one
bracket, and for example against a lower axial end face of the at
least one bracket. Particularly, the lower axial end face of the at
least one bracket serves as a stop surface for the insertion of the
baseplate into the midshell. Such a configuration of the baseplate
allows mastering the vertical position of the baseplate in the
midshell before welding the baseplate to the midshell, and thus
eases the manufacturing of the scroll compressor.
[0039] According to an embodiment of the invention, the at least
one bracket is L-shaped.
[0040] According to an embodiment of the invention, the scroll
compressor includes a plurality of brackets secured to the inner
surface of the midshell. Advantageously, the brackets are angularly
arranged around the drive shaft.
[0041] According to an embodiment of the invention, the mounting
base has a generally rectangular shape, and for example a square
shape, and includes four lateral outer edges and four downwardly
bent flanges each extending from and along a respective one of the
four lateral outer edges.
[0042] According to an embodiment of the invention, a first pair of
said four downwardly bent flanges is configured to extend
substantially parallely to the two mounting rails and a second pair
of said four downwardly bent flanges is configured to extend
transversally to the two mounting rails.
[0043] According to an embodiment of the invention, each downwardly
bent flange of the second pair may only extend along a central part
of the respective lateral outer edge. Such a configuration enables
mounting of several scroll compressors on a rail system comprising
the two mounting rails.
[0044] According to an embodiment of the invention, the midshell
may have a constant diameter over its entire length, or may have
sections with different diameters.
[0045] According to an embodiment of the invention, the midshell is
cylindrical and includes an upper end closed by the upper cap and a
lower end closed by the baseplate.
[0046] According to an embodiment of the invention, the upper cap
is welded to the midshell.
[0047] According to an embodiment of the invention, the compression
unit is arranged within the hermetic enclosure.
[0048] According to an embodiment of the invention, the scroll
compressor includes a lower bearing member and an upper bearing
member configured to rotatably support the drive shaft.
[0049] According to an embodiment of the invention, the cylindrical
rim extends substantially perpendicularly to the extension plane of
the mounting base.
[0050] According to an embodiment of the invention, the cylindrical
rim extends substantially vertically.
[0051] These and other advantages will become apparent upon reading
the following description in view of the drawings attached hereto
representing, as non-limiting examples, several embodiments of a
scroll compressor according to the invention.
BRIEF DESCRIPTION OF THE DRAWINGS
[0052] The following detailed description of several embodiments of
the invention is better understood when read in conjunction with
the appended drawings being understood, however, that the invention
is not limited to the specific embodiments disclosed.
[0053] FIG. 1 is a longitudinal section view of a scroll compressor
according to a first embodiment of the invention.
[0054] FIG. 2 is a partial longitudinal section view of the scroll
compressor of FIG. 1.
[0055] FIG. 3 is a perspective view of a baseplate of the scroll
compressor of FIG. 1.
[0056] FIG. 4 is a top view of the baseplate of FIG. 3.
[0057] FIG. 5 is a perspective view of the baseplate of FIG. 3
mounted on two mounting rails.
[0058] FIG. 6 is a partial longitudinal section view of a scroll
compressor according to a second embodiment of the invention.
[0059] FIG. 7 is a partial longitudinal section view of a scroll
compressor according to a third embodiment of the invention.
[0060] FIG. 8 is a partial longitudinal section view of a scroll
compressor according to a fourth embodiment of the invention.
DETAILED DESCRIPTION
[0061] FIG. 1 shows a scroll compressor 2 comprising a hermetic
enclosure 3 comprising a midshell 4, an upper cap 5 and a baseplate
6. As shown on FIG. 1, the midshell 4 is cylindrical and includes
an upper end closed by the upper cap 5 and a lower end closed by
the baseplate 6. According to the embodiment shown on the figures,
the midshell 4 has a constant diameter over its entire length, and
the upper cap 5 is welded to the midshell 4.
[0062] The scroll compressor 2 further comprises a suction inlet 7
configured to supply the scroll compressor 2 with refrigerant to be
compressed, and a discharge outlet 8 configured to discharge
compressed refrigerant. For example, the suction inlet 7 may be
provided on the midshell 4 and the discharge outlet 4 may be
provided on the upper cap 5.
[0063] The scroll compressor 2 also comprises a support frame 9
arranged within the hermetic enclosure 3 and secured to the
hermetic enclosure 3, and a compression unit 11 also arranged
within the hermetic enclosure 3 and disposed above the support
frame 9. The compression unit 11 is configured to compress the
refrigerant supplied by the suction inlet 7, and includes a fixed
scroll 12, which is fixed in relation to the hermetic enclosure 3,
and an orbiting scroll 13 supported by and in slidable contact with
a thrust bearing surface 14 provided on the support frame 9.
[0064] Furthermore the scroll compressor 2 includes a drive shaft
15 configured to drive the orbiting scroll 13 in an orbital
movement, and an electric motor 16, which may be a variable-speed
electric motor, coupled to the drive shaft 15 and configured to
drive in rotation the drive shaft 15 about a rotational axis A.
According to the embodiment shown on the figures, the electric
motor 16 is disposed below the support frame 9.
[0065] The drive shaft 15 comprises, at its upper end portion, an
eccentric pin 17 which is eccentrically arranged in relation to the
rotational axis A of the drive shaft 15, and which is inserted in a
connecting sleeve part 18 provided on the orbiting scroll 13 so as
to cause the orbiting scroll 13 to be driven in an orbital movement
relative to the fixed scroll 12 when the electric motor 16 is
operated.
[0066] The scroll compressor 2 further includes an upper bearing
member 19 provided on the support frame 9 and configured to
cooperate with an outer circumferential wall surface of the drive
shaft 15, and a lower bearing member 21 configured to cooperate
with an outer circumferential wall surface of a lower end portion
22 of the drive shaft 15. The lower bearing member 21 and the upper
bearing member 19 are particularly configured to rotatably support
the drive shaft 15.
[0067] Particularly, the scroll compressor 2 includes a plurality
of brackets 23 secured to an inner surface of the midshell 4, e.g.
by welding, and configured to support the lower bearing member 21.
According to the embodiment shown on the figures, the brackets 23
are angularly arranged around the drive shaft 15, and each bracket
23 is L-shaped.
[0068] As better shown on FIGS. 2 to 4, the baseplate 6 comprises a
mounting base 24 having a plate shape and including a central
portion 25 which is advantageously concave to accommodate an oil
sump formed at the bottom of the hermetic compressor volume and/or
an oil pump attached to the lower end of the drive shaft 15.
[0069] The mounting base 24 has a generally rectangular shape, and
for example a square shape, and includes four lateral outer edges
26.1, 26.2 and four downwardly bent flanges 27.1, 27.2 each
extending from and along a respective one of the four lateral outer
edges 26.1, 26.2.
[0070] The baseplate 6 further comprises a cylindrical rim 28
surrounding the central portion 25 and extending upwardly so that
the cylindrical rim 28 upwardly protrudes from the mounting base
24. Particularly, the cylindrical rim 28 extends vertically and
perpendicularly to an upper surface of the mounting base 24.
Advantageously, the cylindrical rim 28 and the central portion 25
are concentrically arranged, and the cylindrical rim 28 and the
midshell 4 are also concentrically arranged.
[0071] The cylindrical rim 28 is secured to the mounting base 24 by
a double-welded T-joint 29. The double-welded T-joint 29 includes
an inner welding seam 29.1 connecting an inner surface 28.1 of the
cylindrical rim 28 to the mounting base 24, and an outer welding
seam 29.2 connecting an outer surface 28.2 of the cylindrical rim
28 to the mounting base 24. Advantageously, the inner and outer
welding seams 29.1, 29.2 are annular and concentrically arranged.
Particularly, the diameter of the inner welding seam 29.1
corresponds substantially to the inner diameter of the cylindrical
rim 28, and the diameter of the outer welding seam 29.2 corresponds
substantially to the outer diameter of the cylindrical rim 28.
[0072] According to the embodiment shown on FIGS. 1 to 5, a lower
end portion of the midshell 4 overlaps the inner surface 28.1 of
the cylindrical rim 28 and is surrounded by the cylindrical rim. In
other words, the inner surface 28.1 of the cylindrical rim 28 faces
the outer surface of the lower end portion of the midshell 4.
[0073] Advantageously, the cylindrical rim 28 is secured to the
midshell 4 by lap welding, and the scroll compressor 2 includes an
annular lap joint welding seam 31 securing the midshell 4 to the
cylindrical rim 28. Particularly, the annular lap joint welding
seam 31 connects an upper edge of the cylindrical rim 28 to the
outer surface of the lower end portion of the midshell 4, and the
diameter of the annular lap joint welding seam 31 corresponds
substantially to the outer diameter of the midshell 4.
[0074] According to an embodiment of the invention, the baseplate 6
may be configured to be mounted on two mounting rails 32 (see FIG.
5) extending substantially parallely to each other. The two
downwardly bent flanges 27.1 are configured to extend substantially
parallely to the two mounting rails 32, and the two downwardly bent
flanges 27.2 are configured to extend transversally, and
particularly perpendicularly, to the two mounting rails 32. Each
downwardly bent flange 27.2 may for example only extends along a
central part of the respective lateral outer edge 26.2 in order to
define enlarged passages for the two mounting rails 32.
[0075] The mounting base 24 further comprises fastening holes 33
configured to accommodate fastening elements, e.g. bolts or screws,
to secure the mounting base 24 on the mounting rails 32 or on a
flat support surface.
[0076] FIG. 6 represents a scroll compressor according to a second
embodiment of the invention which differs from the first embodiment
essentially in that the lower end portion of the midshell 4
overlaps and surrounds the outer surface 28.2 of the cylindrical
rim 28, and in that the annular lap joint welding seam 31 connects
a lower edge of the midshell 4 to the outer surface 28.2 of the
cylindrical rim 28. According to said second embodiment, the
diameter of the annular lap joint welding seam 31 corresponds
substantially to the outer diameter of the cylindrical rim 28.
[0077] According to said second embodiment, an upper axial end face
of the cylindrical rim 28 may abut against a lower axial end face
of each bracket 23 so that the lower axial end face of each bracket
23 serves as a stop surface for the insertion of the baseplate 6
into the midshell 4. Such a configuration of the baseplate 6 allows
mastering the vertical position of the baseplate 6 in the midshell
4 before welding the cylindrical rim 28 to the midshell 4, and thus
eases the manufacturing of the scroll compressor 2.
[0078] FIG. 7 represents a scroll compressor according to a third
embodiment of the invention which differs from the first embodiment
essentially in that the lower end portion of the midshell 4 has an
outer diameter which corresponds to the outer diameter of the
cylindrical rim 28, and in that the midshell 4 is secured to the
cylindrical rim 28 by a welded butt joint 36, i.e. by butt
welding.
[0079] The welded butt joint 36 includes an annular butt joint
welding seam 37 connecting a lower edge of the midshell 4 to an
upper edge of the cylindrical rim 28. The diameter of the annular
butt joint welding seam 37 corresponds substantially to the outer
diameter of the cylindrical rim 28.
[0080] FIG. 8 represents a scroll compressor according to a fourth
embodiment of the invention which differs from the third embodiment
essentially in that the welded butt joint 36 further comprises an
inner cylindrical support ring 38 arranged within the hermetic
casing 3 and overlapping a butt joint area 39. The inner
cylindrical support ring 38 particularly overlaps the lower end
portion of the midshell 4 and the upper end portion of the
cylindrical rim 28.
[0081] According to an embodiment not shown on the drawings, the
mounting base 24, and for example the central portion 25 of the
mounting base 24, may be provided with two indentations configured
to cooperate with and to at least partially receive two mounting
rails. Advantageously, the distance between the two indentations
substantially corresponds to the distance between the mounting
rails, and each indentation has a shape which is at least partially
complementary to the outer shape of the respective mounting rail.
Hereby, the same baseplate may be used for mounting a compressor on
rails or on plain surfaces.
[0082] Of course, the invention is not restricted to the
embodiments described above by way of non-limiting examples, but on
the contrary it encompasses all embodiments thereof.
* * * * *